PASS: production GLSL compiled/linked, 6144 pixels match all 4 rotations x 2 mirror states (Mesa software EGL, not Android)
OLD shader: reproduced folds in 20/32 mouth/face configurations
NEW shader: 32/32 configurations monotonic, no inverse-map folds
PASS: 64 configurations x 2048 samples, production smileWarp, software EGL only
